package com.ai.smlcore.util;

import java.math.BigDecimal;

public class AmountUtils {
	    /**金额为分的格式 */    
	   public static final String CURRENCY_FEN_REGEX = "\\-?[0-9]+";    
	       
	   /**   
	    * 将分为单位的转换为元并返回金额格式的字符串 （除100）  
	    *   
	    * @param amount  
	    * @return  
	    * @throws Exception   
	    */    
	   public static String changeF2Y(Long amount) throws Exception{    
	       if(!amount.toString().matches(CURRENCY_FEN_REGEX)) {    
	           throw new Exception("金额格式有误");    
	       }    
	           
	       int flag = 0;    
	       String amString = amount.toString();    
	       if(amString.charAt(0)=='-'){    
	           flag = 1;    
	           amString = amString.substring(1);    
	       }    
	       StringBuffer result = new StringBuffer();    
	       if(amString.length()==1){    
	           result.append("0.0").append(amString);    
	       }else if(amString.length() == 2){    
	           result.append("0.").append(amString);    
	       }else{    
	           String intString = amString.substring(0,amString.length()-2);    
	           for(int i=1; i<=intString.length();i++){    
	               if( (i-1)%3 == 0 && i !=1){    
	                   result.append(",");    
	               }    
	               result.append(intString.substring(intString.length()-i,intString.length()-i+1));    
	           }    
	           result.reverse().append(".").append(amString.substring(amString.length()-2));    
	       }    
	       if(flag == 1){    
	           return "-"+result.toString();    
	       }else{    
	           return result.toString();    
	       }    
	   }    
	       
	   /**  
	    * 将分为单位的转换为元 （除100）  
	    *   
	    * @param amount  
	    * @return  
	    * @throws Exception   
	    */    
	   public static String changeF2Y(String amount) throws Exception{    
	       if(!amount.matches(CURRENCY_FEN_REGEX)) {    
	           throw new Exception("金额格式有误");    
	       }    
	       return BigDecimal.valueOf(Long.valueOf(amount)).divide(new BigDecimal(100)).toString();    
	   }    
	       
	   /**   
	    * 将元为单位的转换为分 （乘100）  
	    *   
	    * @param amount  
	    * @return  
	    */    
	   public static String changeY2F(Long amount){    
	       return BigDecimal.valueOf(amount).multiply(new BigDecimal(100)).toString();    
	   }    
	       
	   /**   
	    * 将元为单位的转换为分 替换小数点，支持以逗号区分的金额  
	    *   
	    * @param amount  
	    * @return  
	    */    
	   public static String changeY2F(String amount){    
	       String currency =  amount.replaceAll("\\$|\\￥|\\,", "");  //处理包含, ￥ 或者$的金额    
	       int index = currency.indexOf(".");    
	       int length = currency.length();    
	       Long amLong = 0l;    
	       if(index == -1){    
	           amLong = Long.valueOf(currency+"00");    
	       }else if(length - index >= 3){    
	           amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));    
	       }else if(length - index == 2){    
	           amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);    
	       }else{    
	           amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");    
	       }    
	       return amLong.toString();    
	    }    
	        
	    public static void main(String[] args) {    
	        System.out.println(AmountUtils.changeY2F("0"));    
	        try {  
	            System.out.println(AmountUtils.changeF2Y("111133"));  
	        } catch (Exception e) {  
	            e.printStackTrace();  
	        }  
	    }    

}
